The welding of aluminum(Al)and steel has attracted more and more interest due to the weight reduction trend in vehicle and aerospace manufacturing industries.5182-O/HC260YD+Z lap joint was produced by friction stir we...The welding of aluminum(Al)and steel has attracted more and more interest due to the weight reduction trend in vehicle and aerospace manufacturing industries.5182-O/HC260YD+Z lap joint was produced by friction stir welding(FSW),and the microstructure and mechanical property of the joint were systemically characterized.The microstructure in horizontal direction of the Al and steel near interface was similar to their corresponding conventional friction stir welded joint.The joint was divided into stir zone of Al(ST-Al),stir zone of interface(ST-I),thermal-mechanically affected zone of steel(TMAZ-Fe)and base material of steel(BM-Fe)according to their distinct microstructure vertically.Three kinds of intermetallic compounds(IMCs)of FeAl_(3),FeAl and Fe_(3)Al were formed at the interface.The horizontal micro hardness distribution exhibited a hat shape and“M”shape in Al and steel,respectively.The hardest region of the joint was located at the ST-I,with a hardness of 175 HV−210 HV.The joint was fractured along the hook structure,with an average shear strength of 73.9 MPa.Fractural morphology of Al and steel indicted a cleavage fracture mode.展开更多
目的了解乳腺癌患者的灵性需求现状及其影响因素。方法2018年12月至2019年3月,便利抽样法选取郑州市四所三级甲等医院收治的乳腺癌患者268例为研究对象,采用自制的一般资料调查表、中文版灵性需求评估量表(the Chinese version of the s...目的了解乳腺癌患者的灵性需求现状及其影响因素。方法2018年12月至2019年3月,便利抽样法选取郑州市四所三级甲等医院收治的乳腺癌患者268例为研究对象,采用自制的一般资料调查表、中文版灵性需求评估量表(the Chinese version of the spiritual needs scale,SNS)对其进行调查,并进行灵性需求影响因素的多元线性回归分析。结果乳腺癌患者的灵性需求总分为(69.24±28.92)分,处于较高水平。5个维度中,条目均分最高为"希望与和平",为(3.07±1.33)分;均分最低为"与超自然的联系",为(2.86±1.30)分。专业对灵性需求的影响较大,其次是手术情况和宗教信仰(均P<0.001)。结论乳腺癌患者有不同程度的灵性需求水平,医护人员应注意了解乳腺癌患者的灵性需求水平,并为其提供灵性照护和实施干预。展开更多
文摘The welding of aluminum(Al)and steel has attracted more and more interest due to the weight reduction trend in vehicle and aerospace manufacturing industries.5182-O/HC260YD+Z lap joint was produced by friction stir welding(FSW),and the microstructure and mechanical property of the joint were systemically characterized.The microstructure in horizontal direction of the Al and steel near interface was similar to their corresponding conventional friction stir welded joint.The joint was divided into stir zone of Al(ST-Al),stir zone of interface(ST-I),thermal-mechanically affected zone of steel(TMAZ-Fe)and base material of steel(BM-Fe)according to their distinct microstructure vertically.Three kinds of intermetallic compounds(IMCs)of FeAl_(3),FeAl and Fe_(3)Al were formed at the interface.The horizontal micro hardness distribution exhibited a hat shape and“M”shape in Al and steel,respectively.The hardest region of the joint was located at the ST-I,with a hardness of 175 HV−210 HV.The joint was fractured along the hook structure,with an average shear strength of 73.9 MPa.Fractural morphology of Al and steel indicted a cleavage fracture mode.
文摘目的了解乳腺癌患者的灵性需求现状及其影响因素。方法2018年12月至2019年3月,便利抽样法选取郑州市四所三级甲等医院收治的乳腺癌患者268例为研究对象,采用自制的一般资料调查表、中文版灵性需求评估量表(the Chinese version of the spiritual needs scale,SNS)对其进行调查,并进行灵性需求影响因素的多元线性回归分析。结果乳腺癌患者的灵性需求总分为(69.24±28.92)分,处于较高水平。5个维度中,条目均分最高为"希望与和平",为(3.07±1.33)分;均分最低为"与超自然的联系",为(2.86±1.30)分。专业对灵性需求的影响较大,其次是手术情况和宗教信仰(均P<0.001)。结论乳腺癌患者有不同程度的灵性需求水平,医护人员应注意了解乳腺癌患者的灵性需求水平,并为其提供灵性照护和实施干预。